Hmm, I wonder if there's a templating change needed here. "Take a bite" is the cost to activate the ability, but if it says "target creature you control" that means it has to go on the stack and resolve, right? What if I activate this ability, hold priority, and activate it again? I could use that trick to put two counters on Grubbing Gelatin, even though the ability says I can only activate it if I do it once.

Maybe this could change to be "activate only as a sorcery", or the text of Take a bite could be "Put a -1/-1 counter on a creature you control" rather than "target". That way in order to activate it you have to pay the cost first, rather than paying the cost as part of the ability resolution.

There's an interesting back-and-forth on this same card with counters. I could activate it, putting a -1/-1 counter on ~, exiling a creature card from a graveyard, and put a +1/+1 counter on ~. Back to neutral! That's probably intended, right?

Anyways, this is a cool take on Scavenging Ooze!

You simply can't target in costs. Take a Bite has to be "Put a -1/-1 counter on a creature you control." The reminder text would go at the end of the ability, like collect evidence

And Rat's right about being able to activate this multiple times while holding priority. All of the Take a Bite cards would probably need to be sorcery speed

Y'all are absolutely right! Take a bite should not be a cost.

Will also change "target creature" to "a creature."